diff --git a/sdk/include/crt/xmmintrin.h b/sdk/include/crt/xmmintrin.h
index a539f09be3b..224cbc25f1b 100644
--- a/sdk/include/crt/xmmintrin.h
+++ b/sdk/include/crt/xmmintrin.h
@@ -29,7 +29,7 @@
 #endif
 
 #if !defined _VCRT_BUILD && !defined _INC_MALLOC
-//#include <malloc.h> // FIXME: This breaks build
+#include <malloc.h> // For _mm_malloc() and _mm_free()
 #endif
 
 #ifdef __cplusplus